/*
 * Copyright (C) 2012 CyberAgent
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.jarlen.photoedit.filter.blend;

public class GPUImageMultiplyBlendFilter extends GPUImageTwoInputFilter
{
	public static final String MULTIPLY_BLEND_FRAGMENT_SHADER = "varying highp vec2 textureCoordinate;\n"
			+ " varying highp vec2 textureCoordinate2;\n"
			+ "\n"
			+ " uniform sampler2D inputImageTexture;\n"
			+ " uniform sampler2D inputImageTexture2;\n"
			+ " \n"
			+ " void main()\n"
			+ " {\n"
			+ "     lowp vec4 base = texture2D(inputImageTexture, textureCoordinate);\n"
			+ "     lowp vec4 overlayer = texture2D(inputImageTexture2, textureCoordinate2);\n"
			+ "          \n"
			+ "     gl_FragColor = overlayer * base + overlayer * (1.0 - base.a) + base * (1.0 - overlayer.a);\n"
			+ " }";

	public GPUImageMultiplyBlendFilter()
	{
		super(MULTIPLY_BLEND_FRAGMENT_SHADER);
	}
}
